Tuesday's IAEA report has rekindled the global debate over what to do about the Iranian nuclear programme with a familiar array of options on the table: engage, sanction or attack. The various protagonists are familiar too. Russia is complaining the IAEA report has spoilt the chance of renewed dialogue, the US, Britain and France warned a new push towards tighter sanctions, and Israel is threatening to strike unless the international community sorts the matter out in the next few months